drush runserver fails on 12.0.0-rc2

[mondrake]

Describe the bug

TypeError: substr(): Argument #3 ($length) must be of type ?int, bool given in substr() (line 138 of /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/src/Commands/core/RunserverCommands.php) #0 /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/src/Commands/core/RunserverCommands.php(138): substr()
#1 /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/src/Commands/core/RunserverCommands.php(96): Drush\Commands\core\RunserverCommands->parseUri()
#2 /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/src/Commands/core/RunserverCommands.php(49): Drush\Commands\core\RunserverCommands->uri()
TypeError: substr(): Argument #3 ($length) must be of type ?int, bool given in substr() (line 138 of /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/src/Commands/core/RunserverCommands.php).
#3 [internal function]: Drush\Commands\core\RunserverCommands->runserver()
#4 /home/runner/work/d8-unit/d8-unit/vendor/consolidation/annotated-command/src/CommandProcessor.php(276): call_user_func_array()
#5 /home/runner/work/d8-unit/d8-unit/vendor/consolidation/annotated-command/src/CommandProcessor.php(212): Consolidation\AnnotatedCommand\CommandProcessor->runCommandCallback()
#6 /home/runner/work/d8-unit/d8-unit/vendor/consolidation/annotated-command/src/CommandProcessor.php(176): Consolidation\AnnotatedCommand\CommandProcessor->validateRunAndAlter()
#7 /home/runner/work/d8-unit/d8-unit/vendor/consolidation/annotated-command/src/AnnotatedCommand.php(391): Consolidation\AnnotatedCommand\CommandProcessor->process()
#8 /home/runner/work/d8-unit/d8-unit/vendor/symfony/console/Command/Command.php(326): Consolidation\AnnotatedCommand\AnnotatedCommand->execute()
#9 /home/runner/work/d8-unit/d8-unit/vendor/symfony/console/Application.php(1081): Symfony\Component\Console\Command\Command->run()
#10 /home/runner/work/d8-unit/d8-unit/vendor/symfony/console/Application.php(320): Symfony\Component\Console\Application->doRunCommand()
#11 /home/runner/work/d8-unit/d8-unit/vendor/symfony/console/Application.php(174): Symfony\Component\Console\Application->doRun()
#12 /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/src/Runtime/Runtime.php(110): Symfony\Component\Console\Application->run()
#13 /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/src/Runtime/Runtime.php(40): Drush\Runtime\Runtime->doRun()
#14 /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/drush.php(139): Drush\Runtime\Runtime->run()
#15 /home/runner/work/d8-unit/d8-unit/vendor/drush/drush/drush(4): require('...')
#16 /home/runner/work/d8-unit/d8-unit/vendor/bin/drush(119): include('...')
#17 {main}. 

To Reproduce
vendor/bin/drush runserver localhost:8080 --default-server=localhost:8080 &

Expected behavior
A running test server.

Actual behavior
Bug aobove.

Workaround
No

System Configuration

Q	A
Drush version?	12.x
Drupal version?	11.x
PHP version	8.2
OS?	Linux

Additional information
Nope

[mondrake]

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